Sewing machine needle and cutter plate



Feb. 2o, 193.4.v

z. ROUTTENBERG 1,947,495

,SEWING MACHINE NEEDLE AND CUTTER PLATE :FIL-r. E. :Era-.7.

Filed June 20, 1932 lr. E. F15.

am e4 4 o l 5 e4 45 NVENTOF:

ACH/)PIA FOUTTENBERCT,

Patented Feb. 20, 1934 UNITED ,STATES PATENT FFICE SEWING MACHINE NEEDLE AND CUTTER PLATE 2 Claims.

This invention relates to improvements in the removable plate that serves to cooperate with the needle and the cutter of a sewing machine.

One of the objects of this invention is to provide a simplified plate that can easily be substituted for the standard plate in a sewing machine.

Another object is to make the needle and cutter plate of two portions, of which the one is designed to be replaced for different cutting operations.

Other objects will appear from the following description and appended claims as well as from the accompanying drawing, in which:-

Fig. 1 is a top plan view of the larger portion or section of the improved needle and cutterplate.

Fig. 2 is a top plan view of the smaller exchangeable section having a cut-out for the cutter for narrow cutting operations.

Fig. 3 is a cross-section on line 3--3 of Fig. 1.

Fig. 4 is a top plan view of the smaller cutter plate section of a slightly modied form for wider cutting operations.

Fig. 5 is a cross-section on line 5-5 of Fig. 4.

Fig. 6 is a cross-section on line 6-6 of Fig. 2.

Fig. 7 is a longitudinal-section on line 7-7 of Fig. 4.

The larger plate-section illustrated in Fig. l is always used together with a smaller platesection such as illustrated in either of Fig. 2 or Fig. 4, the needle of a sewing machine naturally having to remain in the same operative position regardless of cutter operations on account of other mechanisms normally arranged below the needle plate for the second thread to cooperate with the thread in the needle. For this reason the needlehole 7 is provided in this larger section together with the aperture 8 for the material shifter. This larger section is therefore also provided with the portion 9 having a top surface 10, to be in a level of the customary needle plate, over which the materialhandled in a sewing machine moves in the direction of the arrow 11. Parallel to the arrow 11, an edge or shoulder 12 is indicated in Fig. 1 as the lateral termination of this topmost portion 9. Two wings 13 extend sidewise from the portion 9 beyond this shoulder 12 suitably spaced below the top surface l0.

This space above the surface 14 of the wings 13 and below the surface 10 of the portion 9, clearly illustrated in Fig. 3 serves to take care of the thickness of the smaller removable cutter plate-section illustrated in Figs. 2, 4, 5 and 6. Every cutter section is provided with a thicker center portion 15 and thinner side portions 16 offset by the shoulders 17, the shoulders 17 to abut against the shoulder 17a of the wings 13 of the larger plate-section, and the top surface 10s of the smaller section to come flush with the top surface 10 of the larger section.

For narrow cuts, the lateral edge 12 serves as a cutting edge to cooperate with the cutter 18 of which a portion is indicated in Fig. 3 sidewise of the needle 19, the smaller section illustrated in Fig. 2 having for this purpose a cut-out 20 to allow a passing of the cutter below the surface 10s of this smaller plate-section.

Inasmuch as cloth is cut at various distances sidewise along the stitching produced by a needle of a sewing machine, a cutting edge is provided at various distances from the lateral edge 12 of the larger plate-section by means of the exchangeable plate-sections.

In Figs. 4 and 5 one modified form of smaller plate-section is illustrated with a recess 21 forming a cutting edge 22 to cooperate with the modied form of cutter indicated at 18a, the inclined recess portion 23 merely facilitating a cleaning of the cutter recess 22.

It must be understood that a cutter normally operates a shorter distance than the needle of a sewing machine, in fact, only from a point closely above the cloth or material handled in the sewing machine to a point just below the top surface of the combined needle and cutter-plate, explaining that a mere recess, such as indicated at 22 is fully sufficient to take care of the movements of the cutter while the needle normally has to move a greater distance below the needle-plate for intertwining the threads.

Having thus only shown two forms of cutter plate-sections, the section illustrated in Fig. 2 for narrower cuts and the section illustrated in Fig. 4 for wider cuts, it must be understood that any number of exchangeable cutter plate-sections can be provided for various widths of cutting, all being very much similar to the illustration of Fig. 4 excepting for the width between the cutting edges 22 and the front edge 24 of this smaller cutting section.

The front edge 24 is intended to abut against the shoulder 12 of the larger plate-section illustrated in Fig. 1. The smaller plate-sections can therefore be shifted back and forth between the wings 13 of the larger plate-section with respect to the shoulders 17 and 17a until the front edge 24 abuts against the shoulder 12 of the larger plate-section, the smaller plate-section being have been indicated at 25.

Having thus described my invention, I claim:-

1. A combined needle and cutter-plate comprising a larger section and a smaller exchangeable section, thelarger section having a portion forming the top over which the material is handled with a needle-hole and a feeder-hole and being shouldered along a line parallel to the movement of. the material handled over the plate forming an abutment edge, the larger section having furthermore two wings extending laterally from the said portion beyond the said edge and set off below the said top, the smaller section having a heavier portion with shoulders to fitl shiftably between said wings'andhavingiportions to rest upon said wings with a top to come iiushwith the top of the rst named section and withv a lateral edge to abut against the first named edge, the smaller section having furthermore a recess forming a cutting edge parallel to the other.

edges.

2. A combined needle and cutter-plate comprising a larger section and a. smaller exchangeable section, the larger section having a portion forming the top over which material is handled with a needle-hole and a feeder-hole and being shouldered along a line parallel to the movement of the material handled over the plate forming an abutmentand cutting edge, the larger section havingV furthermore two wings extending laterally from said portion beyond said edge and set off below said top, the smaller section having ak heavier portion with shoulders to lit shiftably between said wings and having portions to rest uponsaid wings with a common top to come flush with the top of the rst-named section, the smaller section having furthermore a recess in its top to leavev the cutting edge free in the combinedy tops.

ZACHARIA ROUTTENBERG. 

